FANDOM


Pebbleswithquarzite

Pebbles on a shingle beach in Somerset, England

Pebbles on beach at Broulee -NSW -Australia-2Jan2009

Pebbles on a beach at Broulee, Australia

A pebble is a clast of rock with a particle size of 4 to 64 millimetres based on the Krumbein phi scale of sedimentology. Pebbles are generally considered to be larger than granules (2 to 4 millimetres diameter) and smaller than cobbles (64 to 256 millimetres diameter). A rock made predominantly of pebbles is termed a conglomerate. Pebble tools are among the earliest known man-made artifacts, dating from the Palaeolithic period of human history.

A beach composed chiefly of surface pebbles is commonly termed a shingle beach. This type of beach has armoring characteristics with respect to wave erosion, as well as ecological niches which can provide habitat for animals and plants.

Pebbles come in various colors and textures, and can have streaks of quartz and different colored sedimentary rock. Pebbles are mostly smooth but, dependent on how frequently they come in contact with the sea, they can have marks of contact with other rocks or pebbles. Pebbles left above the high water mark, may have the growth of organisms such as lichen on them, signifying the lack of contact with sea water.

Pebbles can also be found inland where ancient seas used to be covering the land, when seas retreat the rocks become landlocked. Pebbles can also form in rivers, and travel into estuaries where the smoothing continues in the sea.

GalleryEdit

See alsoEdit

Wikipedia
Imported from Wikipedia

This page is being imported from Wikipedia, to create a Wikidwelling stub or article. These steps need to be completed:

  1. Sections not relevant to Wikidwelling can be deleted, or trimmed to a brief comment. Note: Image redlinks should not be removed
  2. Redlinks to articles unlikely to be created on Wikidwelling can be unlinked. (leave links to locations and institutions.)
  3. Categories may need to be adapted or removed - e.g. "people born in the 1940s". Redlinked categories are not a problem.
  4. Templates not used on Wikidwelling should be deleted, like all the interwiki links ({{de:...}}, {{fr:...}},
  5. When these first tasks are basically done, you can remove this template, writing {{Attrib Wikipedia | article name}} in place of this {{Attrib Wikipedia raw | article name}} at the bottom (simply remove "raw").
    You can also:
  6. Move to a section "External links" all Wikimedia project-related templates (e.g. {{Commons}}, {{Commons category}}, {{Wiktionary}}, etc. ).
  7. Add more specific content (related to the Wikidwelling topic) to the article, insert videos from YouTube, etc.

Pages with this template.


The original article was at Pebble. The list of authors can be seen in the history for that page. The text of Wikipedia is available under the CC-BY-SA 3.0 license.


Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.